Webmatrix - CS0103: The name 'Viewbag' does not exist in the current context

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Good afternoon!

I’m implementing a Web Matrix application. My page is in . cshtml (c# with html). I want to use the Viewbag Class, but I can’t find it in @using System.Web.Mvc; nor elsewhere. I searched the internet but did not understand well the procedure. I downloaded the dll Unity.mvc3 but it also did not resolve.

My . cshtml file looks like this:

@using System;
@using System.Collections;
@using System.Collections.Generic;
@using System.ComponentModel;
@using System.Linq;
@using System.Text;
@using System.Web;
@using Newtonsoft.Json;

@{

    ArrayList header = new ArrayList { "Task Name", "Hours"};
    ArrayList data1 = new ArrayList {"Work", 2};
    ArrayList data2 = new ArrayList { "Eat", 2 };
    ArrayList data3 = new ArrayList { "Sleep", 2 };
    ArrayList data = new ArrayList {header, data1, data2, data3};

    string dataStr = JsonConvert.SerializeObject(data, Formatting.None);

    ViewBag.Data = new HtmlString(dataStr);
}

<script>
    var data = JSON.parse('@ViewBag.Data');
    console.log(data);
</script>

<!DOCTYPE html>
<style>
    table {
        border: 1px #c0c0c0 solid;
        width: 100%;
    }
    table th {
        background-color: #00f;
        color: #fff;
    }
    table td {
        background-color: #f0f0f0;
        color: #0c0c0c;
    }
</style>
<html lang="en">
    <head>
        <meta charset="utf-8" />
        <title>Teste</title>
    </head>
    <body>
    </body>
</html>

In Internet searches I heard that I should do some configuration on views/web.config, mine is empty. I tried to put the parameterization of the examples on the internet, but the Viewbag class was also not recognized. Below my views/web.config:

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Here is also the dll folder:

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Here is also the Web.config:

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Should I install mvc3 or some dll? Thanks in advance for the help.

c# asp.net-mvc
  • 1

    This way of using ViewBag is terrible. What version of ASP.NET MVC?

  • My version is 4.0_3.0.0.0. I was introduced to this tool (Webmatrix) and I met cshtml through it. I’m still learning how to deal with it. In fact the ViewBag nor is being recognized, this is being treated as text.

  • Should I replace this version of MVC in the directory? C:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Web.Mvc\v4.0_3.0.0.0__31bf3856ad364e35

  • 1

    I don’t think that’s a good idea. If I were you, would install MVC4 using an installer.

  • Thank you Gypsy! I’ll do what you recommended! Then I’ll tell you what happened.

  • Even installing MVC4 at the address C:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Web.Mvc\v4.0_4.0.0.0__31bf3856ad364e35 the Viewbag remains unknown.

  • Question: where exactly is this accommodation? Apparently it is in Azure, right?

  • He’s on my machine locally, and I’m using IIS Express as a server.

  • Is there a specific need for the use of MVC4? It is already well outdated from the stable version today, which is MVC5. I don’t even know if it’s worth setting up MVC4.

  • It’s because I want Viewbag to be known on the page .cshtml . There in the file it was being seen as a variable and not as an object.

  • My question is another. You could not use MVC5 instead of MVC4?

  • I can, yes, no problem.

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1 answer

1


Let me give you an example of Views/Web.config of ASP.NET MVC5 (I am looking for a good example of MVC4 but it is difficult, and so I asked if it was possible to change the version of framework):

<?xml version="1.0" encoding="utf-8"?>

<configuration>
  <configSections>
    <sectionGroup name="system.web.webPages.razor" type="System.Web.WebPages.Razor.Configuration.RazorWebSectionGroup, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
      <section name="host" type="System.Web.WebPages.Razor.Configuration.HostSection, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
      <section name="pages" type="System.Web.WebPages.Razor.Configuration.RazorPagesSection, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
    </sectionGroup>
  </configSections>

  <system.web.webPages.razor>
    <host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    <pages pageBaseType="System.Web.Mvc.WebViewPage">
      <namespaces>
        <add namespace="System.Web.Mvc" />
        <add namespace="System.Web.Mvc.Ajax" />
        <add namespace="System.Web.Mvc.Html" />
        <add namespace="System.Web.Optimization" />
        <add namespace="System.Web.Routing" />
      </namespaces>
    </pages>
  </system.web.webPages.razor>

  <appSettings>
    <add key="webpages:Enabled" value="false" />
  </appSettings>

  <system.webServer>
    <handlers>
      <remove name="BlockViewHandler" />
      <add name="BlockViewHandler" path="*" verb="*" preCondition="integratedMode" type="System.Web.HttpNotFoundHandler" />
    </handlers>
  </system.webServer>

  <system.web>
    <compilation>
      <assemblies>
        <add assembly="System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
      </assemblies>
    </compilation>
  </system.web>
</configuration>

Thereby, @ViewBag must be recognised in View.

I installed a Visual Studio 2012 here to generate a Views/Web.config for you at MVC4:

<?xml version="1.0"?>

<configuration>
  <configSections>
    <sectionGroup name="system.web.webPages.razor" type="System.Web.WebPages.Razor.Configuration.RazorWebSectionGroup, System.Web.WebPages.Razor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
      <section name="host" type="System.Web.WebPages.Razor.Configuration.HostSection, System.Web.WebPages.Razor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
      <section name="pages" type="System.Web.WebPages.Razor.Configuration.RazorPagesSection, System.Web.WebPages.Razor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
    </sectionGroup>
  </configSections>

  <system.web.webPages.razor>
    <host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    <pages pageBaseType="System.Web.Mvc.WebViewPage">
      <namespaces>
        <add namespace="System.Web.Mvc" />
        <add namespace="System.Web.Mvc.Ajax" />
        <add namespace="System.Web.Mvc.Html" />
        <add namespace="System.Web.Optimization"/>
        <add namespace="System.Web.Routing" />
      </namespaces>
    </pages>
  </system.web.webPages.razor>

  <appSettings>
    <add key="webpages:Enabled" value="false" />
  </appSettings>

  <system.web>
    <httpHandlers>
      <add path="*" verb="*" type="System.Web.HttpNotFoundHandler"/>
    </httpHandlers>

    <!--
        Enabling request validation in view pages would cause validation to occur
        after the input has already been processed by the controller. By default
        MVC performs request validation before a controller processes the input.
        To change this behavior apply the ValidateInputAttribute to a
        controller or action.
    -->
    <pages
        validateRequest="false"
        pageParserFilterType="System.Web.Mvc.ViewTypeParserFilter, System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
        pageBaseType="System.Web.Mvc.ViewPage, System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
        userControlBaseType="System.Web.Mvc.ViewUserControl, System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
      <controls>
        <add assembly="System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" namespace="System.Web.Mvc" tagPrefix="mvc" />
      </controls>
    </pages>
  </system.web>

  <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />

    <handlers>
      <remove name="BlockViewHandler"/>
      <add name="BlockViewHandler" path="*" verb="*" preCondition="integratedMode" type="System.Web.HttpNotFoundHandler" />
    </handlers>
  </system.webServer>
</configuration>

  • Thanks for the support, Gypsy! I’ll do the procedures you gave me and then I’ll tell you what happened!

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